Stop-cock.



PATENTED AUG. 2, 1904.

P. E. HUMMELL.

STOP COCK.

APPLICATION FILED APB.14, 1903.

30 MODEL.

Patented August 2, 1904.

UNITED STATES PATENT OEEIcE.

FRANK E. HUMMELL, OF MCMINN, PENNSYLVANIA.

STOP-COCK.

SPECIFICATION forming part of Letters Patent No. 766,697, dated August 2, 1904.

Application filed April 14, 1903. Serial No. 152,489. (No model.)

To all whom it may concern:

Be it known that I, FRANK E. HUMMELL, a citizen of the United States of America, residing at McMinn, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Step- Cocks, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention is an improvement in those non-freezing stop-cocks which are provided with a turning plug recessed to provide a port or passage at one side between the plug and the wall of the plug-opening which is free to drain when the plug is in closed position.

()ne object of my invention is to produce a non-freezing stop-cock with a longitudinal V- shaped narrow recess providing an angular point or knife-edge located approximately a distance from the wall of the plug-opening equal to the width of contracted intermediate ports which are located between the plugopening and the inlet and outlet of the casing, thus directing the flow from the intermediate inlet-port toward the wall of the plug-opening and around the point or knife-edge and then to the intermediate outlet-port.

Another object of my invention is to produce a non-freezing stop-cock in which the dimensions of the intermediate inlet and outlet ports located at the opposite sides of the plug-opening and the body and the longitudinal recess of the plug are of such proportions in relation one to the other that when the plug is turned to fully-open position the corner edges of the body of the plug overlap the inlet and outlet ports, and by turning the plug in the proper direction the flow from the intermediate inlet-port will be quickly reduced and concentrated onto one side of the angular point or knife-edge and directed to ward the wall of the plug opening to the other side of the angular point or knife-edge and to the fully-opened intermediate outletport, thus providing a free head at the outletport, restricting the flow on one side of the angular point or knife-edge and relieving the flow at the other side thereof.

My invention consists in the novel features in the construction of such stop-cocks, as hereinafter described and claimed.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings, in which Figure 1 is a central vertical section of my improved stop-cocl ,sl1o\ving the plug inclosed in position. Fig. 2 is a horizontal section thereof, taken on the line 2 2 of Fig. '1, showing the plug in fully-open position in dotted lines. Fig. 3 is an end view of the same looking at the outlet. Fig. 4 is a horizontal section taken on the line I 4 of Fig. 1.

1 is a casing or body constructed with an oppositely-disposed inlet-port 2 and an outlet-port 3, a transverse tapering plug-opening 4, and a narrow inlet-port 5 and a narrow outlet-port 6, extending lengthwise of the plugopening intermediate the inlet-port 2 and outlet-port 6, respectively, and the plug-opening.

Fitted in the tapering plug-opening at is my improved plug 7, having a wrench-receiving head 8 at its larger end and a reduced part 9 at its smaller end, having a screw-threaded stem 10, secured by a nut 13. The reduced part 9 is formed with a flat side 12 and receives a washer 14:, formed with a flat face 15, fitting against the flat side 12 of the reduced part 9 and having an annular groove 16 in its inner face. The body of the plug 7 is cut away at one side to provide a longitudinal recess 18, V-shaped in transverse section, and flat ends 7 at the ends of the recess. This recess 18 extends into the plug approximately a distance corresponding to the width of the restricted intermediate ports 5 and 6 and provides the plug with a face of obtuse-angle form in transverse section having inclined diverging faces 17 extending from the body to a position adjacent to the wall of the plugopening. This recess 18 is adapted to estab lish communication around the face between the ports 5 and 6 when the plug is in the position shown in dotted lines in Fig. 2, where it will be observed that the vertical corners 1'7 of the plug overlap the restricted intermediate ports 5 and 6 and reduce the width of the latter when the plug is fully opened to provide a passage for the gas, steam, or other fluid or liquid. The width of the recess-18 is approximately that of the restricted intermediate portsabout one-fourth of the diameter of the plugso that the plug is not weakened by thus recessing it and at the same time is suffioiently reduced to establish a communication between opposite ports. This construction also enables me to graduate the opening of the plug, so as to regulate the flow through the recess 18 between the intermediate inlet and outlet ports, and it is to be observed that when the plug is in the closed position all fluid in the body of the plug may readily drain. The width of the plug at the recessed part is fully three-fourths of the diameter of the body from the rear to its front edge.

When the plug is opened, the fluid or liquid flows from the inlet-port onto one face of the knife-edge toward the wall of the plug-opening, around the latter, and onto the other face of the knife-edge to the outlet-port.

Having thus described my invention, the following is what 1 claim as new therein and desire to-secure by Letters Patent:

A stop-cock comprising a casing having a plug-opening, inlet and outlet ports located on opposite sides of the plug-opening, and narrow slots extending lengthwise of the plugopening and providing, restricted ports intermediate of the inlet and outlet ports respectively and the plug-opening and in width of approximately one-third of the diameter of the plug-opening, and a rotatable solid plug having a body recessed at one side providing a longitudinal angular face of obtuse-angle form in transverse section having its front edge located distant from the wall of the plugopening approximately one-fourth of the diameter of the plug and its rear wall being semicircular so as to be greater than the arc of the recesses in the sides of the plug from slot to slot providing corners adapted to project beyond the slots when the plug is fully opened so that when the plug is. turned in either direction from open position,.one of the slots will be gradually opened while the other slot is gradually closed so as to restrict the flow on one side of the plug and relieve. the flow on the other side thereof.

In testimony whereof I aflix my sign aturein the presence of two witnesses.

FRANK E. HUMMELL.

Witnesses:

FRANK. R. MoGEE, ROBERT J. MARSHALL. 

